Lifting-jack.



LIPTING JACK.

Patented Sept. 12,1911.

W. B. PosTER.

APPLICATION FILED HAY 31, 1910.

COLUMBIA PLANOGRAPH C0..wASHlNG'rDN. D, C.

WILLIAM B. FOSTER, OF NORWOOD, OHIO.

LIFTING-JACK.

Specication of Letters Patent.

Patented Sept. 12, 1911.

Application led May 31, 1910. Serial No. 564,277.

To all whom it may concern:

Be it known that I, l/VILLIAM B. FosTER, a citizen of the United States, residing at Norwood, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Lifting-Jacks, of which the following is a specification.

My invention consists in novel means in a lifting jack whereby quick and powerful action of the jack may be obtained in easy manner, and the invention will be readily understood from the following description and claims, and from the drawing, in which latter: Figure 1 is side elevatio-n of my improved device, shown in operative position for -lifting the axle and wheel of an automobile. Fig. 2 is an edge elevation of the same. Fig. 3 is a vertical axial section of my improved device, partly broken away, taken on a line corresponding to the line 3 3 of Fig. 4l, with the operating handle assumed in the line of the section. Fig. 4L is an axial section of thesame on the line 1 -4 of Fig. 3, with the upper and lower portions broken away, and the nut in closed relation. Fig. 5 is an axial section of the same on the line 5-5 of Fig. 3, with the nut in open relation. Fig. 6 is a bottom perspective view showing the nut in separated relation. Fig. 7 is a top View of the turning member for the nut; and, Fig. 8 is a det-ail vin vertical section on the line 8-8 of Fig. 3, showing the operative connection between the operating handle and gearing.

1 represents a standard, the upper part of which constitutes a housing 2, shown as a separate part resting on and secured to the standard, as by screws 3.

4 is the lifting-screw which is movable up and down in a barrel 5 which preferably depends into the housing.

The standard is provided with a base 6 and thelifting-screw has a shoe 7 its upper end. This shoe is' arranged to contact the part 8 which it is desired to raise, and may be an automobile part for lifting the pneumatic-tire wheel 9 thereof oft' the floor. The lifting-screw is held for preventing turning thereof, as by being provided with a pin 10 received in slots 11 in the wall of the bore 12 which extends lengthwise of the standard, this bore receiving the lower end of the lifting-screw.

15 16 represent the respective nut-parts, shown as nut-halves of a releasable nut provided with internally threaded faces 17 arranged to mate. `and recesses 85 therefor between the nut- Ahalves is so arranged that the nut-halves may be assembled by a relative movement of said nut-halves axially of the pivots thereof while the threaded portions in said nut-halves are in separated relation for providing ready assembling about the liftingscrew. The upper ends of the inner surfaces of said nut-halves are provided with tapering faces 26 which together preferably f form an upper tapering end for the bore of said nut when assembled. The lower end of the barrel 5 is` provided with a tapering end 28 arranged to co-act with the tapering upper end of the bore of said nut-halves. The wings of said nuts are preferably spread suiiiciently so that the lower end of the lbarrel may be received between the wings,

thereby locating the tapering end thereof below the pivots of the nut-halves when said nut and barrel are in positions of closest approach.V The nut is also provided with a tapering lower end as shown at 31.

32 is a turning member for the nut and is shown as a bevel-gear. It has an upper outwardly tapering recess 33 with which the tapering lower end of the nut is ar- There are projections 34 parts and the turning member, the projections being shown on the turning member "and the recesses on the nut-parts.

The construction stated permits ready release of the threaded connection between the nut and lifting-screw and between the nut and the turning-member by manually lifting the outer end of the lifting-screw, for quickly raising the shoe manually to a position close to and under the part to be lifted, and wit-hout the necessity of operating the operating handle, and permits the parts to again readily fall into connected relation when the lifting-screw is permitted to again drop by gravity.

Thus it will be noted by a comparison of Figs. 4E and 5 that when the lifting-screw is manually raised from its outer end for rap- .idly placing its shoe in position under the part to be lifted that itsthreaded connection with the nut-parts will cause these nut-parts raising of the nut-parts in the manner stated y also causes release between the nut-parts and the turning-member.

During the raising of the lifting-screw in the manner stated, the upper thread of the ing-screw. When the lifting-screw is released for permitting it to descend, the lower ends of the nut-parts will drop into engagement with the turning member by gravity for causing the-turning-.member and nutparts to rotate together, and the relative shapes of the -lower ends of the nut-parts and the turning-member cause the threads 3 on the nut-parts to again engage the threads of the lifting-screw.

For permitting complete release of the nut-parts from the lifting-screw when the latter is so raised, the housing is provided with a recess 36, at the lower end of which there is a rib 37, the upper surface of which is inclined toward the nut-'engaging parts in the upper face of the turning-member, these nut-engaging parts practically forining pockets 38 in which the engaging parts of the nut-halves are received. This recess and rib are preferably annularly lformed but are interrupted at one side where engagement between the bevel-gear 32 and a bevelgear 89 is made. The bevel-gear 39 has an annular recess 40 which forms a practical continuation of the recess 36 in the housing. The lower portion of the wall 41 of the recess 40 also formsa practical continuation of the inclined rib 37, asrwill be noted by reference to Fig. 3. The bevel-gear 39 is arranged to turn on a trunnion 42 shown as a screw, threaded into a web 43 of the housing. The bevel-gear 89 turns in the casing.

45 is a ratchet-wheel formed rigid with the bevel-gear 39.

46 is a pawl secured to a stem 47 roclrable in a bearing 48 on a cap 49 for the casing, the cap being rockable about the trunnion 42, as by means of an operating arm 50 having` a handle 51 thereon. The pawl 46 isarranged to be shifted by a thumb-piece 52 on the stem 47, so as to bring the pawl into neutral, position with relation to the ratchetwheelor into aposition to contact either side Y of the ratchet-teeth for` operating the i iratchet-wheel in either direction, springs 5,3

' 54 normally urging said pawl into engagement with said teeth.

nut-parts rides upon the threads of the lift- When the ratchet-wheel is operated in one direction it will cause rising of the liftingscrew by turning the bevel-wheel 39 in olie direction, which in turn turns the bevelwheel 32 which, by reason of the connection between it and the nut-parts, causes the nutparts to revolve and the lifting-screw to rise, the lifting-screw being held from turning by the pin l0. When the pawl is in reverse position, the operation of the operating arm causes a gradual lowering of the liftingscrew.

In practice, the jack is placed under the part to be raised and the shoe 7 raised by hand into position close under the part to i be raised, the lifting-screw slipping through the nut-parts and barrel, the parts again dropping into operative position when such manual raising of the shoe ceases.

My improved device forms ready aiid 1 quickly operable means for raising parts it is desired to lift, and is so constructed and i arranged as to be economical and simple in manufacture and readily assembled.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

l. In a lifting-jack, the combination of a standard, a lifting-screw, a nut received about said lifting-screw comprising separable nut-parts connected for combined axial movement, said standard and nut-parts having disconnecting means between them for disconnecting said nut-parts from said lifting-screw, the raising of said lifting-screw independent of the turning of said nut ca using operative relation in said disconnecting kmeans and the lowering of said liftingscrew independent of the turning of said nut causing operative relation between said nut- `parts and lifting-screw, a turning-member for said nut-parts, and means for operating `said turning-member, substantially as described.

2. In a lifting-jack, the combination of a standard, a lifting-screw, a nut received about said lifting-screw comprising separalbleinut-parts connected for combined axial movement, said standard and nut-parts having disconnecting means between them for disconnecting said nut-parts from said lifting-screw, and a turning-member, said turning-member and nut-parts having releasable Ilifting-screw independent of the turning of said nut causing operative relation between said nut-parts and lifting-screw and between said nut-parts and turning-member,

4substantially as described.

3. In a lifting-j ack, the combination of a :driving connection between them, the raissaid turning-inember and nut-parts having releasable connection therebetween, and said releasable connection arranged for disconnection and said contact-parts for contact upon raising of said lifting-screw independent of the turning of said nut-parts, substantially as described.

4;. In a lifting-jack, the combination of a standard having a housing thereon provided with an inwardly extending barrel, a lifting-screw having axial movement in said standard and barrel, and separable nut-parts z comprising threaded portions arranged tol engage said lifting-screw, and having pivotwings extending upwardly therefrom and pivots for said pivot-wings, said pivotwings arranged to be received at the side of said barrel, said nut-parts provided with contact-parts between said threaded portions and pivots, said barrel having a contactpart arranged to be contacted by said contact-parts on said nut-parts when said nut-` parts are raised for spreading said nut-parts and thereby permitting movement of said lifting-screw across the threads of said threaded portions of said nut-parts, sub"- stantially as described.

5. In a lifting-jack, the combination of a standard having a housing thereon provided with an inwardly extending barrel, a lifting-screw having axial movement in said standard and barrel, separable nut-parts comprising threaded portions arranged to engage said lifting-screw and having pivotwings extending upwardly therefrom and pivots for said pivot-wings, said pivot-wings arranged to be received at the side of said barrel, said nut-parts provided with contactparts between said threaded portions and pivots, said barrel having a contact-part arranged to be contacted by said contact-parts on said nut-parts when said nut-parts are raised for spreading said nut-parts, and a turning-member for said nut-parts, said turning-member and nut-parts having releasable driving connection between them, said lifting-screw arranged for axial movement independent of the operation thereof by said nut-parts, and the said independent axial movement of said lifting-screw for lifting the same causing release of said driving connection and the separation of said nut-parts, suubstantially as described.

6; In a lifting-jack, the combination of a standard having a housing thereon, provided with an inwardly extending barrel having an annular tapering contact-end, a lifting-screw having axial movement in said standard and barrel and arranged to be held from turning, separable nut-parts comprising threaded portions below said barrel and arranged to engage said lifting-screw-and having pivot-wings extending upwardly therefrom on which pivots for said nutparts are located, said pivot-wings arranged to be received at the side of said barrel when in raised positions, and a turningmember for said nut-parts having an annular receiving pocket therein, the said threaded portions merging into an upper normally annular receiving pocket for said annular tapering contact-end of said barrel and a 'lower normally annular tapering end for i said annular receiving pocket of said turning-meinber, and constructed, arranged and operating substantially as described.

7. In a lifting jack, the combination of a standard having a housing thereon provided with an inwardly extending barrel having an annular tapering contact-end, a 1 lifting-screw having axial movement in said standard and barrel and arranged to be held from turning, separable nut-parts comprising threaded portions below said barrel arranged to engage said lifting-screw and having pivot-wings extending upwardly therefrom on which pivots for said nutparts are located, said pivot-wings arranged to be received at the side of said barrel when in raised positions, a bevel-gear for said nut-parts having an annular receivingpocket therein, the said threaded portions merging into an upper normally annular receiving pocket for said annular tapering contact-end of said barrel and a lower nor mally annular tapering end for said annular receiving pocket of said bevel-gear, the said housing having an inner directingiange for directing the separated ends of said nut-parts toward said receiving pocket in said bevel-gear, and a second bevel-gear meshing with said first-named bevel-gear, said second-nained bevel-gear having a tapered recess, the portion of the wall whereof which is nearest said first-named bevel-gear forming a continuation of said directing-flange, and constructed, arranged and operating substantially as described.

8. In a lifting jack, the combination of a standard having a housing thereon' provided with an inwardly extending barrel having ,an annular tapering contact-end, a liftingscrew having axial movement in said standard and barrel and arranged to be held from turning, separable nut-parts comprising threaded portions below said barrel arranged to engage said lifting-screw and having pivot-wings extending upwardly therefrom on which pivots for said nuty merging into an upper normallyL annular receiving-pocket for said annular tapering contact-end of said barrel and a lower normally annular tapering end for said annular receiving pocket of said bevel-gear, the said housing having an inner directingflange for directing the separated ends of,

said nut-parts toward said receiving-pocket in said bevel-gear, and a second bevel-gear meshing withsaid first-named bevel-gear, said second-named bevel-gear having a Vtapered recess, the portion of the wall whereof which is nearest said rst-named bevel-gear forming a continuation of said directing-flange, an operating-arm, and ratchet and pawl mechanism between said operating-arm and said second-named bevelgear, and constructed, arranged and operating substantially as described.

9. In a lift-ing jack, the combination of a standard having a housing thereon, a nut in said housing comprising a plurality of threaded parts interconnected for causing combined axial movement thereof, the said threaded parts being separable at the threaded portions thereof, a lifting-screw received between said interconnected parts, a turning-member for said interconnected parts, said interconnected parts and turningmember having releasable driving means therebetween there being contact-parts between said housing and interconnected parts of said nut, said contact-parts being normally separated, means for permitting manual lifting of said lifting-screw whereby said contact-parts are brought into operative relation and said threaded portions arranged to be brought into operative relation with said lifting-screw by gravity upon release of said lifting-screw,substantially as described.

In testimony whereof I have signed my name hereto in the presence of two subscribing witnesses.

WILLIAM B. FOSTER.

Vitnesses EDWARD SoU'iHwoR'rH, LILLIAN BURNETT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of IPatents, Washington, D. C. 

